Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics
ACP
Articles | Volume 25, issue 21
Articles | Volume 25, issue 21
https://doi.org/10.5194/acp-25-15009-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-25-15009-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 25, issue 21
Research article
 | 
10 Nov 2025
Research article |  | 10 Nov 2025

Airborne quantification of Angolan offshore oil and gas methane emissions

Alina Fiehn, Maximilian Eckl, Magdalena Pühl, Tiziana Bräuer, Klaus-Dirk Gottschaldt, Heinfried Aufmhoff, Lisa Eirenschmalz, Gregor Neumann, Felicitas Sakellariou, Daniel Sauer, Robert Baumann, Guilherme De Aguiar Ventura, Winne Nayole Cadete, Dário Luciano Zua, Manuel Xavier, Paulo Correia, and Anke Roiger

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Short summary
In September 2022, an aircraft campaign measured methane emissions from all 57 Angolan offshore oil and gas facilities. Total CH₄ emissions were 16.9 ± 5.3 t h−1, dominated by older, shallow-water platforms. Emissions were lower than inventories but 2 times larger than operator reports. Trace gas data suggest venting and fugitives as main CH₄ sources. The carbon intensity was 3.4 ± 0.8 g CO₂ eq MJ−1, with older platforms CH₄-dominated and newer deep-water sites CO₂-dominated.
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